Features:1) Available colors: dark blue, light blue, amber, light yellow, green, pink, purple, red and opaque black 2) Regularly stocked rod diameter: 4-30mm3) Regularly stocked rod length: 1,200mm4) Customized sizes are available (outside diameter: 3.5-46mm)5) Main composition: a) SiO2: 80 ?.5% b) B2O3: 13 ?.2% c) Al2O3: 2.4 ?.2% d) Na2O (+K2O): 4.3 ?.2%6) Chemical properties: a) Coefficient of mean linear thermal expansion (20/300 癈): 3.3?.1 (10-6K-1) b) Transformation temperature: 525?5癈 c) Working point: 1,260 ?0癈 d) Softening point: 820 ?0癈 e) Density at 20癈: 2.23g/cm? f) Hydrolytic resistance at 98癈: ISO719-HGB1 g) Hydrolytic resistance at 121癈: ISO720-HGA1 h) Acid resistance class: ISO1776-1 i) Alkali resistance class: ISO695-A2 Packing: export carton producing area:China payment:T/T, L/C at sight supplying capacity:10,000MT/year